/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

package org.apache.iotdb.db.queryengine.execution.operator.process.fill.identity;

import org.apache.iotdb.db.queryengine.execution.operator.process.fill.ILinearFill;

import org.apache.tsfile.block.column.Column;

public class IdentityLinearFill implements ILinearFill {

  @Override
  public Column fill(Column timeColumn, Column valueColumn, long currentRowIndex) {
    return valueColumn;
  }

  @Override
  public boolean needPrepareForNext(
      long rowIndex, Column valueColumn, int lastRowIndexForNonNullHelperColumn) {
    return false;
  }

  @Override
  public boolean prepareForNext(
      long startRowIndex, long endRowIndex, Column nextTimeColumn, Column nextValueColumn) {
    throw new UnsupportedOperationException(
        "IdentityLinearFill's needPrepareForNext() method should always return false.");
  }

  @Override
  public void reset() {
    // do nothing
  }
}
